<?php
	class Tree{
			static public $treeList = array();

			public function create($data,$pid=0){
				foreach($data as $key => $value){
					if($value['pid'] == $pid){
						self::$treeList[] = $value;
						unset($data[$key]);
						self::create($data,$value['id']);
					}
				}
				return self::$treeList;
	}
}
?>